High Pressure Plunger Pump · Frame size 35 PFR 3531CHS Alternate specification

Name: 3531CHS (Alternate specification)
Brand: CAT PUMPS
SKU: 3531CHS

This triplex (three plunger rods) positive displacement, reciprocating plunger pump is constructed with 316 stainless steel manifolds, 316 stainless steel valve assemblies, solid ceramic plungers and standard NBR (Buna-N) seals and O-rings.

Alternate specification of the 3531CHS with a different operating point: 151 l/min, 138 bar, 888 min⁻¹. Standard version: 136 l/min, 83 bar, 800 min⁻¹. View standard version

Request this pump Data sheet (PDF) Spare parts

Technical specifications

Flow rate	151 l/min
Operating pressure	138 bar
Speed	888 min⁻¹
Inlet port	1 1/2" NPT(F)
Discharge port	1" NPT(F)
Shaft diameter	35 mm
Material	Stainless Steel

Downloads

CAD files

Spare parts

Click an item in the drawing or in the parts list to add it to your request list. We turn it into a quotation – no order is placed.

8 kits bundle wearing parts of this pump ↓

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Parts list

Item	Part no.	Description	Qty
5	96049	Screw, HHC Sems (M10x25)S	8
8	134604	Cover, Bearing [06/18]ALE	2
9	815279	Shim, Split, 2-Piece 0 - 2FBR	2
10	12398	O-Ring, Bearing Cover - 70DNBR	2
11	13296	Seal, Oil, Crankshaft 0 - 2NBR	2
12	855049	Shim, Split, 2-Piece 0 - 2S
15	29326	Bearing, RollerSTL	2
20	126725	Rod, Connecting Assembly (Includes: 21, 22, 23) (Model 3521DHS)BZ	3
21	126749	Washer, Locking (M10)STCP	3
22	126593	Washer, Flat (M10.5)STCP	6
23	122045	Screw, HH (M10x55)STZP	6
25	29325	Crankshaft, Dual End (M48)FCM	1
31	828710	Protector, Oil Cap with Foam Gasket 1PE	1
32	43211	Cap, Oil FillerABS	1
33	14177	O-Ring, Oil Filler Cap - 70DNBR	1
34	126743	Bolt, Eye (M12x1.75) (For Lifting Pump Only)STCP	1
37	92241	Gauge, Oil, Bubble with Gasket - 80D 1 - 2PC	1
38	44428	Gasket, Flat, Oil Gauge - 80DNBR	1
40	125753	Screw, HHC, Sems (M8 x 25) (Model 2530E)S	8
48	25625	Plug, Drain (1/4" x 19 BSP[M])STCP	1
49	23170	O-Ring, Drain Plug - 70DNBR	1
50	45936	Cover, Rear (See Tech Bulltin 118)ALE	1
51	16612	O-Ring, Cover - 70DNBR	1
53	134784	Crankcase Assembly (Includes 54)ALE	1
54	27488	Pin, GuideS	2
56	27790	Pan, OilPOP	1
59	92538	Screw, HHC, Sems (M6 x 16) (Model 2530E)S	2
64	43864	Pin, CrossheadCM	3
65	49166	Rod, Plunger (Model 3521DHS)SSHB	3
69	126587	Washer, Oil SealSTCP	3
70	100488	Seal, Oil, CrankcaseNBRS	3
75	43865	Slinger, BarrierS	3
88	45676	Washer, Keyhole (M16)S	3
90	43921	Plunger (M40 x 145)CC	3
95	89778	Stud, Plunger Retainer (M10x135)SS	3
96	20189	Back-up-Ring, Plunger RetainerPTFE	3
97	11345	O-Ring, Plunger Retainer - 70DNBR	3
98	44085	Gasket, Plunger Retainer (M7) Model 3501, 3501C, Gasket, Plunger Retainer (M10) Model 3511, 3511CSS	3
99	44084	Retainer, Plunger (M10)SS	3
100	814279	Retainer, Seal, 2-PiecePVDF	3
101	44112	Wick, Long Tab	3
106	44113	Seal, Low-Pressure, with SS-SpringNBR	3
107	44115	Spacer, Low-Pressure, SealNAB	3
107	45381	Spacer, Low-Pressure, SealSS	3
110	45124	Manifold, InletNAB	1
110	45365	Manifold, Inlet (Model 3521DHS)SS	1
110	49464	Manifold, Inlet - (Models 3570, 3570S)BBCP	1
112	11379	O-Ring, Inlet Manifold - 70DNBR	3
117	44585	Screw, HSH (M14x40)S	4
126	46494	Adapter, FemaleBB	3
126	48391	Adapter, FemaleD	3
127	44609	V-PackingSTG	6
128	43928	Adapter, MaleBB	3
128	45368	Adapter, MaleSS	3
141	49519	Spring, Large CoilSS	3
155	48860	O-Ring, V-Packing Cylinder - 90DNBR	6
156	48362	Backup Ring, V-Packing, Spacer, OuterD	6
157	49478	Spacer, V-PackingBB	3
157	49520	Spacer, V-PackingSS	3
157	49521	Spacer, V-PackingNAB	3
162	48363	Backup-Ring, Valve SeatD	6
163	26142	O-Ring, Seat - 80DNBR	6
164	44612	Seat, SteppedSS	6
164	44727	Seat, SteppedS	6
166	43932	ValveS	6
166	44108	ValveSS	6
167	44109	Spring, ValveSS	6
168	44728	Retainer, SpringPVDF	6
170	44729	Washer, Spring RetainerSS	6
171	44644	Coil Spring (70kg), Valve PlugSS	6
172	89827	O-Ring, Valve Plug - 90DNBR	6
173	48364	Backup-Ring, Valve PlugD	6
174	44643	Plug, Valve [02/06]NAB	6
174	46444	Plug, Valve [02/06]FBB	6
174	49300	Plug, ValveSSD	6
185	49299	Manifold, DischargeSSD	1
185	49465	Manifold, DischargeBBCP	1
185	76335	Manifold, DischargeNAB	1
188	89981	Screw, HSH (M12 x 70)S	8
250	855042	Protector, Shaft with Two (2) Screws, Lockwashers and WashersNY	1
–	3535HS	) 16.95 (430.5) (3531DHS, 3531CHS, 3537HS)
–	6124	Gasket, Liquid (3 oz. / 0,1 l)	1
–	6139	Lubricant, Anti-Seize (8 oz) (Model 1531)	1
–	30278	Oiler (1 oz) (Not Shown) 3	3
–	30696	Reverse Pliers (Not Shown)	1
–	32273	Crankcase Oil Seal Removal and Installation Kit (Not Shown)	1
–	34018	Mount, Direct (STZP R)	1
–	34021	Key (M10 x 8 x 70) 1	1
–	34039	Mount, Direct (S) 1	1
–	34235	Kit, Valve - Standard NBR (Model 3535HS)	2
–	34314	Kit, Oil Drain (3/8" x 48") (Not Shown)	1
–	76514	Mount, Rail Assembly (S) (Includes: 34039) 1	1
–	80540	Screw, Adjusting (M12 x 100) 2	2
–	92674	Mount, Rail Assembly (STZP R) (Includes: 34018)	1
–	125397	Manifold, Inlet, Flushed (1/4" Flush Ports) (Model 3521C)SS	1
–	814522	Head, Complete with NBR Seals and O-Rings (Model 3537HS)	1
–	818372	Head, Complete with NBR Seals and O-Rings (Model 3531DHS )	1
–	818427	Head, Complete with NBR Seals and O-Rings (Model 3535HS)	1
–	819000	Assembly, Crankcase, Cast Iron Conversion (Not Shown) 1	1
–	990013	Hub, "B", 35 mm (STL) 1	1
–	6133	Oil, Crankcase, Can 4l	1

in the request list covered by a requested kit

Seal and valve kits

A kit bundles the wearing parts of one assembly. Selecting it highlights the items it covers in the drawing and the parts list – once requested, they stay marked.

Seal kits

Seal kit

31040

NBR (STD)Medium Nitrile (Buna-N)

contains 6 items · one kit per pump
Parts list
- 97 11345 O-Ring, Plungerhalter 3×
- 106 44113 Dichtung, Niederdruck 3×
- 112 11379 O-Ring, Saugstutzen 3×
- 127 44609 V-Packung 6×
- 155 48860 O-Ring, Distanzstück, V-Packung 6×
- 156 48362 Stützring, O-Ring, Distanzstück, V-Packung 6×
Seal kit

33055

FPM (0.0110)Fluorocarbon

contains 6 items · one kit per pump
Parts list
- 97 11375 O-Ring, Plungerhalter 3×
- 106 44740 Dichtung, Niederdruck 3×
- 112 14183 O-Ring, Saugstutzen 3×
- 127 44741 V-Packung 6×
- 155 20137 O-Ring, Distanzstück, V-Packung 6×
- 156 48362 Stützring, O-Ring, Distanzstück, V-Packung 6×
Seal kit

33262

EPDM (0.0220)Ethylene Propylene Diene Monomer

contains 6 items · one kit per pump
Parts list
- 97 701490 O-Ring, Plungerhalter 3×
- 106 46955 Dichtung, Niederdruck 3×
- 112 701491 O-Ring, Saugstutzen 3×
- 127 44609 V-Packung 6×
- 155 701492 O-Ring, Distanzstück, V-Packung 6×
- 156 48362 Stützring, O-Ring, Distanzstück, V-Packung 6×
Seal kit

76948

IPFE (0.0770)I-Perfluoroelastomer

contains 7 items · one kit per pump
Parts list
- 97 702961 O-Ring, Plungerhalter 3×
- 106 76398 Dichtung, Niederdruck 3×
- 112 702705 O-Ring, Saugstutzen 3×
- 127 76780 V-Packung 6×
- 155 703159 O-Ring, Distanzstück, V-Packung 6×
- 156 202164 Stützring, O-Ring, Distanzstück, V-Packung 6×
- 156 20464 Backup Ring, V-Packing Spacer 6×

Valve kits

Valve kit

34017

NBR (STD)Medium Nitrile (Buna-N)

contains 11 items · 2 kits per pump
Parts list
- 162 48363 Stützring, Ventilsitz 3×
- 163 26142 O-Ring, Ventilsitz 3×
- 164 44727 Ventilsitz (3520, 3520C) 3×
- 164 44612 Ventilsitz 3×
- 166 43932 Ventil (3520, 3520C) 3×
- 166 44108 Ventil 3×
- 167 44109 Feder, Ventil 3×
- 168 44728 Federhalter, Ventil 3×
- 170 44729 Scheibe, Federhalter 3×
- 172 89827 O-Ring, Ventilstopfen 3×
- 173 48364 Stützring, Ventilstopfen 3×
Valve kit

31955

FPM (0.0110)Fluorocarbon

contains 9 items · 2 kits per pump
Parts list
- 162 48363 Stützring, Ventilsitz 3×
- 163 14330 O-Ring, Ventilsitz 3×
- 164 44612 Ventilsitz (3520, 3520C) 3×
- 166 44108 Ventil (3520, 3520C) 3×
- 167 44109 Feder, Ventil 3×
- 168 44728 Federhalter, Ventil 3×
- 170 44729 Scheibe, Federhalter 3×
- 172 11747 O-Ring, Ventilstopfen 3×
- 173 48364 Stützring, Ventilstopfen 3×
Valve kit

31952

EPDM (0.0220)Ethylene Propylene Diene Monomer

contains 9 items · 2 kits per pump
Parts list
- 162 48363 Stützring, Ventilsitz 3×
- 163 701493 O-Ring, Ventilsitz 3×
- 164 44612 Ventilsitz (3520, 3520C) 3×
- 166 44108 Ventil (3520, 3520C) 3×
- 167 44109 Feder, Ventil 3×
- 168 44728 Federhalter, Ventil 3×
- 170 44729 Scheibe, Federhalter 3×
- 172 701494 O-Ring, Ventilstopfen 3×
- 173 48364 Stützring, Ventilstopfen 3×
Valve kit

76617

IPFE (0.0770)I-Perfluoroelastomer

contains 12 items · 2 kits per pump
Parts list
- 162 48363 Stützring, Ventilsitz 3×
- 162 44614 Stützring, Ventilsitz 3×
- 163 702808 O-Ring, Ventilsitz 3×
- 164 44612 Ventilsitz (3520, 3520C) 3×
- 166 44108 Ventil (3520, 3520C) 3×
- 167 44109 Feder, Ventil 3×
- 168 44728 Federhalter, Ventil 3×
- 170 44729 Scheibe, Federhalter 3×
- 172 703169 O-Ring, Ventilstopfen 3×
- 172 701369 O-Ring, Ventilstopfen 3×
- 173 48364 Stützring, Ventilstopfen 3×
- 173 20388 Stützring, Ventilstopfen 3×